A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6240-00-274-4028
NSN 5905-01-462-5417
NSN 5910-00-932-3024
NSN 5925-01-435-7604
NSN 5950-01-406-6300
NSN 5999-01-004-3797
NSN 6105-01-578-2118
NSN 5835-01-555-8963
NSN 5910-01-524-6992
NSN 5930-00-450-6205
NSN 5960-01-462-1864
NSN 6150-00-202-9150